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Name
Date
Section 21.2 Relative-Age Dating of Rocks
Main Idea
Main Ideas
Use with page 560.
(continued)
Details
Compare the different types of unconformities using the graphic
organizer.
Type:
Type:
How formed?
How formed?
Uncomformities
Type:
How formed?
S YNTHESIZE
Hypothesize what could have happened to separate the Permian
Kaibab Formation that rims the top of the Grand Canyon and the Permian Kaibab
Formation that is found 300 km away at the bottom of a 200-m gorge.
Fossils and Rock Record
245